Treadle for machinery



(No Model.)

J-. E. KIRK.

. TREADLB FOR MACHINERY. No. 516,333. Patented Mar. 13, 1894-.

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- x7z en" @7580 711727 73 UNTTEB STATES JASON E. KIRK, OF

PATENT UTTTQE.

TREADLE FOR MACHINERY.

SPECIFICATION forming part of Letters latent N 0. 516,333, dated March 13, 1894.

Application filed April 15, 1893. $erial No. 470.360- (No model.) i

To all whom it may concern:

Be it known that I, JASON E. KIRK, a citi zen of the United States, residing at Burnside, in the county of Cleartield and State of Pennsylvania, have invented a new and useful Treadle for Machinery, of which the following is a specification.

My invention relates to improvements in treadles for sewing and other machines, the objects in view being to provide means to prevent the stopping of the drive-wheel upon the dead centers and enable the machinery to be started solely by means of the treadle.

In carrying out my invention I employ a double crank pin provided with main and auxiliary spindles, and a supplemental treadle operating in connection with the ordinary treadle, such treadles being connected, respectively, to the spindles of the crank pin. By this construction the spindles of the crank pin travel in different paths and are continually changing their relative positions whereby at no time can the two spindles be upon a dead center simultaneously.

My invention is more fully described hereinafter in connection with the drawings, and the novel features thereof are particularly pointed out in the appended claims.

In the drawings-Figure 1 isa perspective view of a treadle mechanism constructed in accordance with my invention. Fig. 2 is a vertical sectional view of the treadles showing the crank pin,di*iving-wheel and pitmen in elevation. Fig. 3 is a similar view showing the main treadle in its depressed position in order to illustrate the position of the crank pin at such time. Fig. 4 is a detail view of the crank-pin detached.

Similar numerals of reference indicate corresponding parts in all the figures of the drawlugs.

1 represents a supporting framework which may be of any preferred construction to suit the kind of. machine to which my improvement is applied. In this case it is the form of frame commonly used for sewing machines.

2 represents a driving-wheel and 3 represents a transverse horizontal treadle-shaft upon which the ordinary treadle 4 is fulmounting the crunied. The manner of treadle upon said shaft forms no part of this invention.

5 represents a supplemental treadle which is fulcrumed independently to the treadleshaft in close proximity to the under surface of the treadle 4, and is provided at opposite ends with vertical projections 6 which register with correspondingly shaped openings or BURNSIDE, ASSIGNR OF ONE-HALF TO JOSEPH KIRK, 7

OF HAWK RUN, PENNSYLVANIA.

slots 7 in the treadle t and are adapted in oer.

tain relative positions of the treadles to lie in such openings or slots and project above the upper surface of the treadle 4.

8 represents a crank pin, which, for convenience, I have termed a double crank pin, and it is provided with the main and auxiliary parallel spindles 9 and 10 arranged in different radial planes,-or planes embracing the radii of the driving-wheel. These spindles are so disposed with relation to each other that when at either the top or the bottom of the Wheel, or in more general terms, when adjacent to the line of the dead centers they are disposed in different vertical planes, and only upon the descending and ascending sides of the wheel are such spindles arranged in the same vertical plane. Y The spindles of the crank pin are connected, respectively, to the main and supplemental treadles by means of the pitmen l1.

In Fig. 2 of the drawings, the main treadle is shown in full lines in its elevated position with the spindle to which it is connected arranged upon the line of the dead center of the driving-wheel, and by reference to said figure it will be noted,furthermore, that the spindle to which the supplemental treadle is connected has not yet reached the limit of its vertical movement. It willbe seen, furthermore, that the projections at the lower or near end of the supplemental treadle extend above the surface of the main treadle and hence are in position to be encountered by the foot of the operator. Therefore, the depression of the heel of the operator upon such projections will cause an elevation of the spindle to which such sup- .plemental treadle is connected, and hence the wheel will be started in the desireddirection.

From the above description, taken in connectionwith the drawings, its will be understood thatin this way the wheel may be started from any position of rest at any time, and furthermore, that the wheel will, in each case, be started in the same direction. Furthermore, by reversing the relative positions of the spindles of the crank pin, for instance, by arranging the auxiliary spindle to which the supplemental treadle is connected upon the opposite side of the main spindle to which the main treadle is connected, as indicated by dotted lines in Fig. 2, the wheel will, in each case, be started in the opposite direction.

Various changes in the construction of the treadles and of the crank pin may be made without departing from the spirit of my invention, the only essential points to be observed being that such treadles operate substantially together and that the spindles of the crank pin lie in different vertical planes at points near the line of the dead center, so that at no time can both spindles he on the line of the dead center, and therefore locked against movement.

Having described my invention, What I claim is- 1. In a device of the class described, the combination, with main and supplemental co-acting treadles, and a drive-wheel to reradial planes and connections between said treadles and the spindles, respectively, sub stantially as specified.

2. In a device of the class described, the combination with a drive-wheel, of a double crank pin having main and auxiliary spindles arranged in different radial planes, a main treadle, a subjacent supplemental treadle having projections which lie in openings in said main treadle, and connections between said main and supplemental treadles and the spindles of the crank pin, respectively, sub stantially as specified.

3. The combination with a drive-wheel, of a double crank pin having main and auxiliary spindles, main and supplemental treadles mounted independently upon a common treadle-shaft, said supplemental treadle being provided with vertical projections to lie in openings in said main treadle, and pitmen connecting said main and supplemental treadles, respectively, to the spindles of the crank pin, substantially as specified.

In testimony that I claim the foregoing as myown I have hereto affixed my signaturein the presence of two witnesses.

JASON E. KIRK. lVitnesses:

J 0s. M. WILSON, WILLIAM REED. 

